411.1 In computing any period of time prescribed or allowed by this chapter, by notice, order, rule or regulation to WASA, or by statute, the day of the act, event, bill, notice or default after which the designated period of time begins to run is not to be included.

411.2 The last day of the period so computed shall be included unless it is a Saturday, Sunday, or legal holiday, in which event the period runs until midnight of the next day which is not a Saturday, Sunday, or legal holiday.

411.3 Whenever a party is required to serve papers or do some act within a prescribed period, and does so by mail, three (3) days shall be added to the prescribed period.

SOURCE: Final Rulemaking published at 40 DCR 1300, 1310 (February 12, 1993); as amended by Final Rulemaking published at 46 DCR 5358 (June 18, 1999).